A rare signed copy of Adolf Hitler's Mein Kampf sold for £21,000 at auction today. The infamous book was sold alongside a signed self-portrait, which fetched £12,300 at Mullock's auctions at Ludlow racecourse, Shropshire. Hitler gave the book to a fellow inmate, an early member of the Nazi party, at Landsberg prison following his failed attempt in 1923 to overthrow the German government, known as the beer hall putsch. The German inscription reads: "Herrn Johann Georg Maurer. In memory of our time together in prison in Landsberg. Cordially dedicated by Adolf Hitler. Christmas 1925."